Data on environment related parameters are normally characterised be certain limitations regarding precision, accuracy, reliability and validity. These limitations should be known and considered by the use of such data. The following section summarises the limitations of the data and maps produced by the chosen approach for preparation of the Zoning Atlas.

• The concept provided covers only the macro level aspects, and for micro-Ievel planning detailed studies are to be carried out, The information provided by the set of maps are primarily to be used for a reconnaissance of the planning area.
• The Zoning Atlas considers only the environmental aspects.
• The identified zones for industrial sitting are based on studies in 1: 250,000 scale and based on available data, Hence, the conclusions drawn from this Atlas only provide, guidelines for taking decisions on industrial ng and should not be considered as a , consent to establish industries, Micro level detailed studies are to be carried to evaluate environmental impact assessmeot {EIA }before taking decision on siting an industry.
• The conclusions in the present Atlas are on rapid EIA and hence in the identified industrial zones, even if the risks due to pollution are high/medium/low, there should not be any discharge of effluent/emission/waste without treatment and meeting the required environment standards.
• The industries adopting claen technology for manufacturing process may not have the pollution generation potential same as those without the clean technology process and hence may be suitable even of 'medium' and 'high' risk zones.